Abstract Dasineura oleae (Angelini, 1831) (Diptera: Cecidomyiidae), the olive leaf gall midge, is a pest of crops that was not problematic in Italy until 2016 when massive infestation this reported small region central Italy. We identified infested orchards using farmers’ reports and quantified level parasitism rate each field. also explored effect landscape on both parasitoids abundance semi-n...